package lab02.Test20;

import java.util.Scanner;

public class Test {
    public static void main(String[] args) {
        //
        String result;
        //从键盘输入数据
        Scanner scanner = new Scanner(System.in);
        result = scanner.next();
        //System.out.println(result);
        //仅仅输出字符串的全部数字字符
        char tmp;
        int i;
        for(i=0;i<result.length();i++){
            tmp=result.charAt(i);
            if(tmp>'0' && tmp<='9'){
                System.out.print(tmp);
            }
        }

    }
}
